Move {mail,japanese}/p5-Mail-SpamAssassin to &/spamassassin, in the name of
improving accessibility.
I think people who want to just find the port/package and install it are
more likely to look for "spamassassin the program" than "spamassassin the
perl module collection."

his plugin enables the scanning of incoming mail received from a POP,
IMAP, or LOCAL account using SpamAssassin. It can optionally delete mail
identified as spam or save it to a designated folder, and also can be used
to train a local SpamAssassin (or a remote one if SpamAssassin >= 3.1 is
installed both locally and remotely). According to your SpamAssassin server
configuration, it can show worse performance than Bogofilter, (slower,
eating more CPU), but can catch spam with better accuracy.
WWW: http://claws-mail.org/plugin.php?plugin=spamassassin